The Enhancement of the Catalytic Oxidation of CO on Ir/CeO2 Nanojunctions,Inorganic Chemistry

当前位置： X-MOL 学术 › Inorg. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

The Enhancement of the Catalytic Oxidation of CO on Ir/CeO2 Nanojunctions
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2019-09-30 , DOI: 10.1021/acs.inorgchem.9b02356
Cichang Zong _{1,

2} , Changlai Wang ₃ , Lin Hu ₂ , Ruirui Zhang ₃ , Peng Jiang ₃ , Jing Chen ₃ , Lingzhi Wei ₁ , Qianwang Chen _{2,

3}

Affiliation

Heterogeneous catalysts facilitate various chemical reactions through the changing of their surface charge density. Herein, we demonstrate an interface engineering strategy to enhance the Ir catalytic performance for oxidation of CO by constructing Ir/CeO₂ nanojunctions using a wet chemical reduction process. The as-prepared Ir/CeO₂ nanojunctions show a complete CO conversion temperature (T₁₀₀) of 110 °C under 1 vol % CO and retains long-term durability even after 24 h. The Ir atoms and CeO₂ supports were connected by O atoms, which changes the surface electronic structure of Ir atoms. DFT calculations demonstrate that the significant increase in electron density at the interface between Ir and CeO₂ plays a pivotal role in the enhancement of CO oxidation.

中文翻译：

Ir / CeO ₂纳米结上CO催化氧化作用的增强

非均相催化剂通过改变其表面电荷密度来促进各种化学反应。在这里，我们展示了一种界面工程策略，可通过使用湿化学还原工艺构建Ir / CeO ₂纳米结来增强Ir的CO氧化催化性能。所制备的Ir / CeO ₂纳米结在1 vol％的CO下显示出110°C的完全CO转化温度（T ₁₀₀），即使在24小时后仍保持长期耐久性。Ir原子和CeO ₂载体通过O原子连接，这改变了Ir原子的表面电子结构。DFT计算表明，Ir和CeO ₂之间的界面处的电子密度显着增加在增强CO氧化中起关键作用。

更新日期：2019-09-30

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南